Advantage is a mechanic in Baldur's Gate 3. While players are under the effect of Advantage and perform an ability check, saving throw or an attack roll they will roll a second D20 while making that role and use the higher of those rolls to decide the outcome. Disadvantage is the opposite mechanic, where the lowest of two rolls is applied.
Advantage and Disadvantage
Advantage and disadvantage are applied to the roll of the d20. Advantage means that you roll the d20 two times when making an Attack Roll, Ability Check or Saving Throw, and use the higher of the two values. On the other hand, disadvantage means that you roll the d20 two times but in this case, use the lower of the two values. Disadvantage is one of the worst situations you can be on when rolling on D&D, and should be avoided at all costs. While advantage nearly doubles your chance of success and should be sought out.
|How to get Advantage||How to get Disadvantage|
Advantage and Disadvantage Interactions
If multiple situations affect a roll and each one grants Advantage or imposes Disadvantage on it, you don’t roll more than one additional D20. If two favorable situations grant advantage, for example, you still roll only one additional d20.
If circumstances cause a roll to have both Advantage and Disadvantage, you are considered to have neither of them, and you roll one D20. This is true even if multiple circumstances impose disadvantage and only one grants advantage or vice versa. In such a situation, you have neither advantage nor disadvantage.